./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:05:24,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:05:24,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:05:24,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:05:24,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:05:24,401 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:05:24,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:05:24,410 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:05:24,412 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:05:24,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:05:24,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:05:24,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:05:24,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:05:24,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:05:24,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:05:24,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:05:24,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:05:24,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:05:24,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:05:24,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:05:24,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:05:24,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:05:24,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:05:24,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:05:24,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:05:24,457 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:05:24,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:05:24,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:05:24,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:05:24,460 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:05:24,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:05:24,461 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:05:24,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:05:24,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:05:24,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:05:24,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:05:24,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:05:24,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:05:24,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:05:24,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:05:24,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:05:24,471 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:05:24,521 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:05:24,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:05:24,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:05:24,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:05:24,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:05:24,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:05:24,524 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:05:24,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:05:24,524 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:05:24,524 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:05:24,525 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:05:24,526 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:05:24,526 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:05:24,526 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:05:24,526 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:05:24,526 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:05:24,527 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:05:24,527 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:05:24,528 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:05:24,528 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:05:24,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:05:24,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:05:24,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:05:24,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:05:24,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:05:24,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:05:24,529 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:05:24,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:05:24,530 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:05:24,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:05:24,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:05:24,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:05:24,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:24,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:05:24,532 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:05:24,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:05:24,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:05:24,532 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:05:24,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:05:24,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:05:24,534 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:05:24,534 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21dc9f7e2ddd4ffb05ac36477bf46e7266bc68ad137742c8de338dbab6571869 [2022-11-03 02:05:24,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:05:24,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:05:24,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:05:24,816 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:05:24,817 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:05:24,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2022-11-03 02:05:24,888 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/data/38e53fa90/57589d1f1b8840d1924416f248b947a4/FLAGa31204f7f [2022-11-03 02:05:25,529 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:05:25,530 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c [2022-11-03 02:05:25,548 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/data/38e53fa90/57589d1f1b8840d1924416f248b947a4/FLAGa31204f7f [2022-11-03 02:05:25,763 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/data/38e53fa90/57589d1f1b8840d1924416f248b947a4 [2022-11-03 02:05:25,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:05:25,767 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:05:25,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:25,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:05:25,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:05:25,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cd77492 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:25, skipping insertion in model container [2022-11-03 02:05:25,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:05:25" (1/1) ... [2022-11-03 02:05:25,785 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:05:25,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:05:26,110 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2022-11-03 02:05:26,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:26,482 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:05:26,506 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/sv-benchmarks/c/product-lines/elevator_spec9_product31.cil.c[5910,5923] [2022-11-03 02:05:26,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:05:26,610 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:05:26,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26 WrapperNode [2022-11-03 02:05:26,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:05:26,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:26,612 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:05:26,612 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:05:26,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,775 INFO L138 Inliner]: procedures = 97, calls = 346, calls flagged for inlining = 28, calls inlined = 25, statements flattened = 925 [2022-11-03 02:05:26,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:05:26,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:05:26,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:05:26,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:05:26,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,835 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,847 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:05:26,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:05:26,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:05:26,849 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:05:26,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (1/1) ... [2022-11-03 02:05:26,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:05:26,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:26,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:05:26,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:05:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure bigMacCall [2022-11-03 02:05:26,979 INFO L138 BoogieDeclarations]: Found implementation of procedure bigMacCall [2022-11-03 02:05:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure enterElevator [2022-11-03 02:05:26,980 INFO L138 BoogieDeclarations]: Found implementation of procedure enterElevator [2022-11-03 02:05:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection [2022-11-03 02:05:26,980 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection [2022-11-03 02:05:26,980 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:05:26,981 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedInDirection__wrappee__empty [2022-11-03 02:05:26,981 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-03 02:05:26,981 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-03 02:05:26,981 INFO L130 BoogieDeclarations]: Found specification of procedure getDestination [2022-11-03 02:05:26,981 INFO L138 BoogieDeclarations]: Found implementation of procedure getDestination [2022-11-03 02:05:26,982 INFO L130 BoogieDeclarations]: Found specification of procedure isBlocked [2022-11-03 02:05:26,982 INFO L138 BoogieDeclarations]: Found implementation of procedure isBlocked [2022-11-03 02:05:26,982 INFO L130 BoogieDeclarations]: Found specification of procedure getCurrentFloorID [2022-11-03 02:05:26,982 INFO L138 BoogieDeclarations]: Found implementation of procedure getCurrentFloorID [2022-11-03 02:05:26,982 INFO L130 BoogieDeclarations]: Found specification of procedure buttonForFloorIsPressed [2022-11-03 02:05:26,982 INFO L138 BoogieDeclarations]: Found implementation of procedure buttonForFloorIsPressed [2022-11-03 02:05:26,983 INFO L130 BoogieDeclarations]: Found specification of procedure pressInLiftFloorButton [2022-11-03 02:05:26,983 INFO L138 BoogieDeclarations]: Found implementation of procedure pressInLiftFloorButton [2022-11-03 02:05:26,983 INFO L130 BoogieDeclarations]: Found specification of procedure leaveElevator [2022-11-03 02:05:26,983 INFO L138 BoogieDeclarations]: Found implementation of procedure leaveElevator [2022-11-03 02:05:26,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:05:26,984 INFO L130 BoogieDeclarations]: Found specification of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:05:26,984 INFO L138 BoogieDeclarations]: Found implementation of procedure stopRequestedAtCurrentFloor__wrappee__twothirdsfull [2022-11-03 02:05:26,984 INFO L130 BoogieDeclarations]: Found specification of procedure getWeight [2022-11-03 02:05:26,985 INFO L138 BoogieDeclarations]: Found implementation of procedure getWeight [2022-11-03 02:05:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure isExecutiveFloorCalling [2022-11-03 02:05:26,985 INFO L138 BoogieDeclarations]: Found implementation of procedure isExecutiveFloorCalling [2022-11-03 02:05:26,985 INFO L130 BoogieDeclarations]: Found specification of procedure getReverseHeading [2022-11-03 02:05:26,987 INFO L138 BoogieDeclarations]: Found implementation of procedure getReverseHeading [2022-11-03 02:05:26,987 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-03 02:05:26,987 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-03 02:05:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure __automaton_fail [2022-11-03 02:05:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __automaton_fail [2022-11-03 02:05:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure isTopFloor [2022-11-03 02:05:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure isTopFloor [2022-11-03 02:05:26,988 INFO L130 BoogieDeclarations]: Found specification of procedure resetCallOnFloor [2022-11-03 02:05:26,988 INFO L138 BoogieDeclarations]: Found implementation of procedure resetCallOnFloor [2022-11-03 02:05:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure initPersonOnFloor [2022-11-03 02:05:26,989 INFO L138 BoogieDeclarations]: Found implementation of procedure initPersonOnFloor [2022-11-03 02:05:26,989 INFO L130 BoogieDeclarations]: Found specification of procedure removePersonFromFloor [2022-11-03 02:05:26,989 INFO L138 BoogieDeclarations]: Found implementation of procedure removePersonFromFloor [2022-11-03 02:05:26,990 INFO L130 BoogieDeclarations]: Found specification of procedure getOrigin [2022-11-03 02:05:26,990 INFO L138 BoogieDeclarations]: Found implementation of procedure getOrigin [2022-11-03 02:05:26,991 INFO L130 BoogieDeclarations]: Found specification of procedure continueInDirection [2022-11-03 02:05:26,992 INFO L138 BoogieDeclarations]: Found implementation of procedure continueInDirection [2022-11-03 02:05:26,992 INFO L130 BoogieDeclarations]: Found specification of procedure isEmpty [2022-11-03 02:05:26,993 INFO L138 BoogieDeclarations]: Found implementation of procedure isEmpty [2022-11-03 02:05:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:05:26,993 INFO L130 BoogieDeclarations]: Found specification of procedure isPersonOnFloor [2022-11-03 02:05:26,993 INFO L138 BoogieDeclarations]: Found implementation of procedure isPersonOnFloor [2022-11-03 02:05:26,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:05:26,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:05:26,994 INFO L130 BoogieDeclarations]: Found specification of procedure isFloorCalling [2022-11-03 02:05:26,994 INFO L138 BoogieDeclarations]: Found implementation of procedure isFloorCalling [2022-11-03 02:05:27,185 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:05:27,188 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:05:28,482 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:05:29,383 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:05:29,383 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 02:05:29,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:29 BoogieIcfgContainer [2022-11-03 02:05:29,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:05:29,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:05:29,391 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:05:29,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:05:29,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:05:25" (1/3) ... [2022-11-03 02:05:29,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7281d50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:29, skipping insertion in model container [2022-11-03 02:05:29,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:05:26" (2/3) ... [2022-11-03 02:05:29,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7281d50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:05:29, skipping insertion in model container [2022-11-03 02:05:29,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:05:29" (3/3) ... [2022-11-03 02:05:29,398 INFO L112 eAbstractionObserver]: Analyzing ICFG elevator_spec9_product31.cil.c [2022-11-03 02:05:29,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:05:29,418 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:05:29,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:05:29,523 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71a7883d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:05:29,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:05:29,531 INFO L276 IsEmpty]: Start isEmpty. Operand has 388 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 282 states have internal predecessors, (411), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-11-03 02:05:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-03 02:05:29,567 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:29,569 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:29,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:29,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:29,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1560275502, now seen corresponding path program 1 times [2022-11-03 02:05:29,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:29,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654634145] [2022-11-03 02:05:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:29,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:05:30,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:30,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654634145] [2022-11-03 02:05:30,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654634145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:30,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:30,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:05:30,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012919860] [2022-11-03 02:05:30,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:30,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:05:30,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:30,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:05:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:05:30,114 INFO L87 Difference]: Start difference. First operand has 388 states, 261 states have (on average 1.5747126436781609) internal successors, (411), 282 states have internal predecessors, (411), 99 states have call successors, (99), 26 states have call predecessors, (99), 26 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-03 02:05:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:30,315 INFO L93 Difference]: Finished difference Result 406 states and 636 transitions. [2022-11-03 02:05:30,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:05:30,318 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) Word has length 77 [2022-11-03 02:05:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:30,346 INFO L225 Difference]: With dead ends: 406 [2022-11-03 02:05:30,348 INFO L226 Difference]: Without dead ends: 384 [2022-11-03 02:05:30,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:05:30,364 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:30,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 562 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-03 02:05:30,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-11-03 02:05:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 259 states have (on average 1.5637065637065637) internal successors, (405), 278 states have internal predecessors, (405), 99 states have call successors, (99), 26 states have call predecessors, (99), 25 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2022-11-03 02:05:30,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 598 transitions. [2022-11-03 02:05:30,488 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 598 transitions. Word has length 77 [2022-11-03 02:05:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:30,490 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 598 transitions. [2022-11-03 02:05:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 1 states have call successors, (14) [2022-11-03 02:05:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 598 transitions. [2022-11-03 02:05:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-03 02:05:30,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:30,507 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:30,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:05:30,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:30,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:30,509 INFO L85 PathProgramCache]: Analyzing trace with hash -538972801, now seen corresponding path program 1 times [2022-11-03 02:05:30,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:30,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683714614] [2022-11-03 02:05:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:30,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:05:31,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:31,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683714614] [2022-11-03 02:05:31,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683714614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:31,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:31,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-03 02:05:31,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128861155] [2022-11-03 02:05:31,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:05:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:31,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:05:31,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:31,174 INFO L87 Difference]: Start difference. First operand 384 states and 598 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 02:05:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:33,906 INFO L93 Difference]: Finished difference Result 1161 states and 1835 transitions. [2022-11-03 02:05:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:05:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 78 [2022-11-03 02:05:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:33,913 INFO L225 Difference]: With dead ends: 1161 [2022-11-03 02:05:33,914 INFO L226 Difference]: Without dead ends: 793 [2022-11-03 02:05:33,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:05:33,919 INFO L413 NwaCegarLoop]: 579 mSDtfsCounter, 1148 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1223 SdHoareTripleChecker+Valid, 1627 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:33,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1223 Valid, 1627 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-03 02:05:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-03 02:05:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 755. [2022-11-03 02:05:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 518 states have (on average 1.5752895752895753) internal successors, (816), 551 states have internal predecessors, (816), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-03 02:05:34,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1193 transitions. [2022-11-03 02:05:34,017 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1193 transitions. Word has length 78 [2022-11-03 02:05:34,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:34,020 INFO L495 AbstractCegarLoop]: Abstraction has 755 states and 1193 transitions. [2022-11-03 02:05:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 5 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-11-03 02:05:34,021 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1193 transitions. [2022-11-03 02:05:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-03 02:05:34,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:34,027 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:34,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:05:34,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:34,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash -173815726, now seen corresponding path program 1 times [2022-11-03 02:05:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:34,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928849854] [2022-11-03 02:05:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:34,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:05:34,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928849854] [2022-11-03 02:05:34,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928849854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:34,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:34,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-03 02:05:34,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551821122] [2022-11-03 02:05:34,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:34,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:05:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:34,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:05:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:34,433 INFO L87 Difference]: Start difference. First operand 755 states and 1193 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:05:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:35,158 INFO L93 Difference]: Finished difference Result 826 states and 1305 transitions. [2022-11-03 02:05:35,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:35,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 82 [2022-11-03 02:05:35,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:35,164 INFO L225 Difference]: With dead ends: 826 [2022-11-03 02:05:35,165 INFO L226 Difference]: Without dead ends: 811 [2022-11-03 02:05:35,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-03 02:05:35,167 INFO L413 NwaCegarLoop]: 558 mSDtfsCounter, 662 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1840 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:35,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1840 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 02:05:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-03 02:05:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 759. [2022-11-03 02:05:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 522 states have (on average 1.5708812260536398) internal successors, (820), 555 states have internal predecessors, (820), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-03 02:05:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1197 transitions. [2022-11-03 02:05:35,225 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1197 transitions. Word has length 82 [2022-11-03 02:05:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:35,226 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1197 transitions. [2022-11-03 02:05:35,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-03 02:05:35,227 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1197 transitions. [2022-11-03 02:05:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-03 02:05:35,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:35,230 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:05:35,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 887501073, now seen corresponding path program 1 times [2022-11-03 02:05:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:35,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312353212] [2022-11-03 02:05:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 02:05:35,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:35,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312353212] [2022-11-03 02:05:35,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312353212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:35,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:35,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:05:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363900507] [2022-11-03 02:05:35,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:35,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:05:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:35,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:05:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:05:35,462 INFO L87 Difference]: Start difference. First operand 759 states and 1197 transitions. Second operand has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 02:05:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:35,645 INFO L93 Difference]: Finished difference Result 778 states and 1221 transitions. [2022-11-03 02:05:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:05:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) Word has length 87 [2022-11-03 02:05:35,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:35,651 INFO L225 Difference]: With dead ends: 778 [2022-11-03 02:05:35,651 INFO L226 Difference]: Without dead ends: 763 [2022-11-03 02:05:35,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:35,653 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 30 mSDsluCounter, 1755 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2206 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:35,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 2206 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-11-03 02:05:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 759. [2022-11-03 02:05:35,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 522 states have (on average 1.5670498084291187) internal successors, (818), 555 states have internal predecessors, (818), 188 states have call successors, (188), 48 states have call predecessors, (188), 48 states have return successors, (189), 180 states have call predecessors, (189), 183 states have call successors, (189) [2022-11-03 02:05:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1195 transitions. [2022-11-03 02:05:35,703 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1195 transitions. Word has length 87 [2022-11-03 02:05:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:35,704 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1195 transitions. [2022-11-03 02:05:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 2 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 1 states have call successors, (16) [2022-11-03 02:05:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1195 transitions. [2022-11-03 02:05:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-03 02:05:35,707 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:35,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:35,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:05:35,708 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:35,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1698869369, now seen corresponding path program 1 times [2022-11-03 02:05:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:35,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611700479] [2022-11-03 02:05:35,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:35,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:35,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:35,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611700479] [2022-11-03 02:05:35,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611700479] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:35,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:35,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4734050] [2022-11-03 02:05:35,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:35,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:35,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:35,829 INFO L87 Difference]: Start difference. First operand 759 states and 1195 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:36,080 INFO L93 Difference]: Finished difference Result 2211 states and 3515 transitions. [2022-11-03 02:05:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 94 [2022-11-03 02:05:36,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:36,095 INFO L225 Difference]: With dead ends: 2211 [2022-11-03 02:05:36,095 INFO L226 Difference]: Without dead ends: 1468 [2022-11-03 02:05:36,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:36,106 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 553 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:36,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 1218 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-11-03 02:05:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1440. [2022-11-03 02:05:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1010 states have (on average 1.5792079207920793) internal successors, (1595), 1072 states have internal predecessors, (1595), 340 states have call successors, (340), 87 states have call predecessors, (340), 89 states have return successors, (354), 318 states have call predecessors, (354), 335 states have call successors, (354) [2022-11-03 02:05:36,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2289 transitions. [2022-11-03 02:05:36,234 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2289 transitions. Word has length 94 [2022-11-03 02:05:36,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:36,236 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 2289 transitions. [2022-11-03 02:05:36,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:36,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2289 transitions. [2022-11-03 02:05:36,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-03 02:05:36,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:36,240 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:36,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:05:36,240 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:36,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1125484940, now seen corresponding path program 1 times [2022-11-03 02:05:36,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:36,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350010763] [2022-11-03 02:05:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:36,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:36,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:36,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350010763] [2022-11-03 02:05:36,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350010763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:36,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:36,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:36,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898503875] [2022-11-03 02:05:36,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:36,381 INFO L87 Difference]: Start difference. First operand 1440 states and 2289 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:36,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:36,671 INFO L93 Difference]: Finished difference Result 4253 states and 6820 transitions. [2022-11-03 02:05:36,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:36,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 95 [2022-11-03 02:05:36,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:36,689 INFO L225 Difference]: With dead ends: 4253 [2022-11-03 02:05:36,690 INFO L226 Difference]: Without dead ends: 2832 [2022-11-03 02:05:36,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:36,697 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 552 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:36,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 1224 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:36,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2022-11-03 02:05:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2803. [2022-11-03 02:05:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 1987 states have (on average 1.584297936587821) internal successors, (3148), 2107 states have internal predecessors, (3148), 644 states have call successors, (644), 165 states have call predecessors, (644), 171 states have return successors, (700), 594 states have call predecessors, (700), 639 states have call successors, (700) [2022-11-03 02:05:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 4492 transitions. [2022-11-03 02:05:36,879 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 4492 transitions. Word has length 95 [2022-11-03 02:05:36,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:36,880 INFO L495 AbstractCegarLoop]: Abstraction has 2803 states and 4492 transitions. [2022-11-03 02:05:36,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 4492 transitions. [2022-11-03 02:05:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-03 02:05:36,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:36,883 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:36,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:05:36,884 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:36,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash -530432919, now seen corresponding path program 1 times [2022-11-03 02:05:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:36,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870089519] [2022-11-03 02:05:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:36,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:36,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:36,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870089519] [2022-11-03 02:05:36,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870089519] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:36,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:36,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944131292] [2022-11-03 02:05:36,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:36,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:36,997 INFO L87 Difference]: Start difference. First operand 2803 states and 4492 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:37,402 INFO L93 Difference]: Finished difference Result 8338 states and 13508 transitions. [2022-11-03 02:05:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 96 [2022-11-03 02:05:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:37,439 INFO L225 Difference]: With dead ends: 8338 [2022-11-03 02:05:37,439 INFO L226 Difference]: Without dead ends: 5560 [2022-11-03 02:05:37,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:37,455 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 551 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:37,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 1230 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5560 states. [2022-11-03 02:05:37,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5530. [2022-11-03 02:05:37,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 3942 states have (on average 1.5854895991882294) internal successors, (6250), 4178 states have internal predecessors, (6250), 1252 states have call successors, (1252), 321 states have call predecessors, (1252), 335 states have return successors, (1452), 1146 states have call predecessors, (1452), 1247 states have call successors, (1452) [2022-11-03 02:05:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 8954 transitions. [2022-11-03 02:05:37,910 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 8954 transitions. Word has length 96 [2022-11-03 02:05:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:37,910 INFO L495 AbstractCegarLoop]: Abstraction has 5530 states and 8954 transitions. [2022-11-03 02:05:37,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:37,911 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 8954 transitions. [2022-11-03 02:05:37,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-11-03 02:05:37,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:37,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:37,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 02:05:37,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:37,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:37,917 INFO L85 PathProgramCache]: Analyzing trace with hash 736314454, now seen corresponding path program 1 times [2022-11-03 02:05:37,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:37,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650662889] [2022-11-03 02:05:37,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:37,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:38,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:38,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650662889] [2022-11-03 02:05:38,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650662889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:38,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:38,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266246413] [2022-11-03 02:05:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:38,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:38,101 INFO L87 Difference]: Start difference. First operand 5530 states and 8954 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:38,856 INFO L93 Difference]: Finished difference Result 16509 states and 27181 transitions. [2022-11-03 02:05:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 97 [2022-11-03 02:05:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:38,952 INFO L225 Difference]: With dead ends: 16509 [2022-11-03 02:05:38,952 INFO L226 Difference]: Without dead ends: 11016 [2022-11-03 02:05:38,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:38,985 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 550 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:38,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1236 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11016 states. [2022-11-03 02:05:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11016 to 10985. [2022-11-03 02:05:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10985 states, 7853 states have (on average 1.5846173436903095) internal successors, (12444), 8321 states have internal predecessors, (12444), 2468 states have call successors, (2468), 633 states have call predecessors, (2468), 663 states have return successors, (3184), 2250 states have call predecessors, (3184), 2463 states have call successors, (3184) [2022-11-03 02:05:39,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10985 states to 10985 states and 18096 transitions. [2022-11-03 02:05:39,829 INFO L78 Accepts]: Start accepts. Automaton has 10985 states and 18096 transitions. Word has length 97 [2022-11-03 02:05:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:39,830 INFO L495 AbstractCegarLoop]: Abstraction has 10985 states and 18096 transitions. [2022-11-03 02:05:39,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:39,830 INFO L276 IsEmpty]: Start isEmpty. Operand 10985 states and 18096 transitions. [2022-11-03 02:05:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-03 02:05:39,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:39,833 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:39,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:05:39,834 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1350781259, now seen corresponding path program 1 times [2022-11-03 02:05:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:39,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326099544] [2022-11-03 02:05:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 02:05:40,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:40,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326099544] [2022-11-03 02:05:40,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326099544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:40,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:40,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:05:40,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716273069] [2022-11-03 02:05:40,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:40,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:05:40,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:40,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:05:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:40,044 INFO L87 Difference]: Start difference. First operand 10985 states and 18096 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:40,852 INFO L93 Difference]: Finished difference Result 11699 states and 19315 transitions. [2022-11-03 02:05:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:05:40,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 98 [2022-11-03 02:05:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:40,955 INFO L225 Difference]: With dead ends: 11699 [2022-11-03 02:05:40,956 INFO L226 Difference]: Without dead ends: 11688 [2022-11-03 02:05:40,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:05:40,966 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 536 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 1234 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:40,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 1234 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2022-11-03 02:05:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 11658. [2022-11-03 02:05:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11658 states, 8334 states have (on average 1.583993280537557) internal successors, (13201), 8831 states have internal predecessors, (13201), 2620 states have call successors, (2620), 672 states have call predecessors, (2620), 703 states have return successors, (3438), 2387 states have call predecessors, (3438), 2615 states have call successors, (3438) [2022-11-03 02:05:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11658 states to 11658 states and 19259 transitions. [2022-11-03 02:05:41,808 INFO L78 Accepts]: Start accepts. Automaton has 11658 states and 19259 transitions. Word has length 98 [2022-11-03 02:05:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:41,809 INFO L495 AbstractCegarLoop]: Abstraction has 11658 states and 19259 transitions. [2022-11-03 02:05:41,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-11-03 02:05:41,813 INFO L276 IsEmpty]: Start isEmpty. Operand 11658 states and 19259 transitions. [2022-11-03 02:05:41,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:05:41,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:41,819 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:41,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 02:05:41,820 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:41,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:41,825 INFO L85 PathProgramCache]: Analyzing trace with hash 882062043, now seen corresponding path program 1 times [2022-11-03 02:05:41,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:41,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994801113] [2022-11-03 02:05:41,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:41,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-03 02:05:42,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:42,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994801113] [2022-11-03 02:05:42,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994801113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:42,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:05:42,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:05:42,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552820100] [2022-11-03 02:05:42,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:42,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:42,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:05:42,168 INFO L87 Difference]: Start difference. First operand 11658 states and 19259 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:05:43,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:43,015 INFO L93 Difference]: Finished difference Result 24693 states and 41692 transitions. [2022-11-03 02:05:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:43,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 147 [2022-11-03 02:05:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:43,083 INFO L225 Difference]: With dead ends: 24693 [2022-11-03 02:05:43,084 INFO L226 Difference]: Without dead ends: 13052 [2022-11-03 02:05:43,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:05:43,141 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 77 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:43,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 1711 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:05:43,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13052 states. [2022-11-03 02:05:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13052 to 12014. [2022-11-03 02:05:43,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12014 states, 8642 states have (on average 1.577991205739412) internal successors, (13637), 9139 states have internal predecessors, (13637), 2652 states have call successors, (2652), 672 states have call predecessors, (2652), 719 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-03 02:05:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12014 states to 12014 states and 19840 transitions. [2022-11-03 02:05:44,100 INFO L78 Accepts]: Start accepts. Automaton has 12014 states and 19840 transitions. Word has length 147 [2022-11-03 02:05:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:44,102 INFO L495 AbstractCegarLoop]: Abstraction has 12014 states and 19840 transitions. [2022-11-03 02:05:44,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2022-11-03 02:05:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 12014 states and 19840 transitions. [2022-11-03 02:05:44,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-03 02:05:44,111 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:44,111 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:44,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:05:44,111 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash -61041865, now seen corresponding path program 1 times [2022-11-03 02:05:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:44,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062804116] [2022-11-03 02:05:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-03 02:05:44,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:44,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062804116] [2022-11-03 02:05:44,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062804116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766386158] [2022-11-03 02:05:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:44,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:44,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:44,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:44,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:05:45,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:45,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1887 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 02:05:45,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:45,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766386158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:45,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:45,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-11-03 02:05:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898771465] [2022-11-03 02:05:45,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:45,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:05:45,369 INFO L87 Difference]: Start difference. First operand 12014 states and 19840 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:46,573 INFO L93 Difference]: Finished difference Result 25337 states and 42892 transitions. [2022-11-03 02:05:46,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:46,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 154 [2022-11-03 02:05:46,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:46,670 INFO L225 Difference]: With dead ends: 25337 [2022-11-03 02:05:46,671 INFO L226 Difference]: Without dead ends: 13340 [2022-11-03 02:05:46,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:05:46,722 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 213 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:46,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 1452 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:05:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13340 states. [2022-11-03 02:05:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13340 to 13340. [2022-11-03 02:05:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13340 states, 9934 states have (on average 1.6226092208576606) internal successors, (16119), 10431 states have internal predecessors, (16119), 2652 states have call successors, (2652), 706 states have call predecessors, (2652), 753 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-03 02:05:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13340 states to 13340 states and 22322 transitions. [2022-11-03 02:05:47,726 INFO L78 Accepts]: Start accepts. Automaton has 13340 states and 22322 transitions. Word has length 154 [2022-11-03 02:05:47,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:47,727 INFO L495 AbstractCegarLoop]: Abstraction has 13340 states and 22322 transitions. [2022-11-03 02:05:47,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:47,727 INFO L276 IsEmpty]: Start isEmpty. Operand 13340 states and 22322 transitions. [2022-11-03 02:05:47,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-03 02:05:47,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:47,737 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:47,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:47,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:47,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1560640415, now seen corresponding path program 1 times [2022-11-03 02:05:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:47,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945179468] [2022-11-03 02:05:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:47,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-11-03 02:05:48,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:48,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945179468] [2022-11-03 02:05:48,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945179468] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:48,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966635358] [2022-11-03 02:05:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:48,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:48,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:48,181 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:48,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:05:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1892 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:48,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 02:05:48,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:48,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966635358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:48,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:48,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:05:48,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430307614] [2022-11-03 02:05:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:48,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:48,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:48,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:48,719 INFO L87 Difference]: Start difference. First operand 13340 states and 22322 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:49,626 INFO L93 Difference]: Finished difference Result 27989 states and 47822 transitions. [2022-11-03 02:05:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:49,627 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 159 [2022-11-03 02:05:49,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:49,720 INFO L225 Difference]: With dead ends: 27989 [2022-11-03 02:05:49,721 INFO L226 Difference]: Without dead ends: 14666 [2022-11-03 02:05:49,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:49,775 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 211 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:49,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1452 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:05:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14666 states. [2022-11-03 02:05:50,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14666 to 14666. [2022-11-03 02:05:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14666 states, 11226 states have (on average 1.6569570639586675) internal successors, (18601), 11723 states have internal predecessors, (18601), 2652 states have call successors, (2652), 740 states have call predecessors, (2652), 787 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-03 02:05:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14666 states to 14666 states and 24804 transitions. [2022-11-03 02:05:50,697 INFO L78 Accepts]: Start accepts. Automaton has 14666 states and 24804 transitions. Word has length 159 [2022-11-03 02:05:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:50,697 INFO L495 AbstractCegarLoop]: Abstraction has 14666 states and 24804 transitions. [2022-11-03 02:05:50,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:50,698 INFO L276 IsEmpty]: Start isEmpty. Operand 14666 states and 24804 transitions. [2022-11-03 02:05:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-03 02:05:50,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:50,705 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:50,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-03 02:05:50,933 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1628656001, now seen corresponding path program 1 times [2022-11-03 02:05:50,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:50,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377165347] [2022-11-03 02:05:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:50,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-11-03 02:05:51,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:51,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377165347] [2022-11-03 02:05:51,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377165347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:51,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608883743] [2022-11-03 02:05:51,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:51,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:51,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:51,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:51,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:05:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:51,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 1896 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:51,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-03 02:05:51,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:51,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608883743] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:51,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:51,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:05:51,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320088729] [2022-11-03 02:05:51,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:51,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:51,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:51,683 INFO L87 Difference]: Start difference. First operand 14666 states and 24804 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:52,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:52,695 INFO L93 Difference]: Finished difference Result 30641 states and 52752 transitions. [2022-11-03 02:05:52,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:52,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 163 [2022-11-03 02:05:52,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:52,780 INFO L225 Difference]: With dead ends: 30641 [2022-11-03 02:05:52,780 INFO L226 Difference]: Without dead ends: 15992 [2022-11-03 02:05:52,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:52,830 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 209 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:52,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 1452 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:05:52,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15992 states. [2022-11-03 02:05:53,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15992 to 15992. [2022-11-03 02:05:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15992 states, 12518 states have (on average 1.6842147307876658) internal successors, (21083), 13015 states have internal predecessors, (21083), 2652 states have call successors, (2652), 774 states have call predecessors, (2652), 821 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-03 02:05:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15992 states to 15992 states and 27286 transitions. [2022-11-03 02:05:53,983 INFO L78 Accepts]: Start accepts. Automaton has 15992 states and 27286 transitions. Word has length 163 [2022-11-03 02:05:53,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:53,984 INFO L495 AbstractCegarLoop]: Abstraction has 15992 states and 27286 transitions. [2022-11-03 02:05:53,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:53,985 INFO L276 IsEmpty]: Start isEmpty. Operand 15992 states and 27286 transitions. [2022-11-03 02:05:53,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-11-03 02:05:53,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:53,995 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:54,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:54,221 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:54,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash 908791093, now seen corresponding path program 1 times [2022-11-03 02:05:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:54,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177427880] [2022-11-03 02:05:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:54,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:54,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-03 02:05:54,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:05:54,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177427880] [2022-11-03 02:05:54,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177427880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:05:54,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022922678] [2022-11-03 02:05:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:54,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:54,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:05:54,676 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:05:54,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:05:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:05:55,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:05:55,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:05:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-03 02:05:55,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:05:55,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022922678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:05:55,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:05:55,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2022-11-03 02:05:55,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041763450] [2022-11-03 02:05:55,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:05:55,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:05:55,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:05:55,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:05:55,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:05:55,154 INFO L87 Difference]: Start difference. First operand 15992 states and 27286 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:05:56,114 INFO L93 Difference]: Finished difference Result 33293 states and 57682 transitions. [2022-11-03 02:05:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:05:56,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 166 [2022-11-03 02:05:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:56,224 INFO L225 Difference]: With dead ends: 33293 [2022-11-03 02:05:56,225 INFO L226 Difference]: Without dead ends: 17318 [2022-11-03 02:05:56,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:05:56,288 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 207 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:56,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1452 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:05:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17318 states. [2022-11-03 02:05:57,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17318 to 17318. [2022-11-03 02:05:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17318 states, 13810 states have (on average 1.7063721940622738) internal successors, (23565), 14307 states have internal predecessors, (23565), 2652 states have call successors, (2652), 808 states have call predecessors, (2652), 855 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-03 02:05:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17318 states to 17318 states and 29768 transitions. [2022-11-03 02:05:57,410 INFO L78 Accepts]: Start accepts. Automaton has 17318 states and 29768 transitions. Word has length 166 [2022-11-03 02:05:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:05:57,410 INFO L495 AbstractCegarLoop]: Abstraction has 17318 states and 29768 transitions. [2022-11-03 02:05:57,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:05:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 17318 states and 29768 transitions. [2022-11-03 02:05:57,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 02:05:57,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:05:57,418 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:05:57,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:05:57,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:05:57,633 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:05:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:05:57,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1331330039, now seen corresponding path program 1 times [2022-11-03 02:05:57,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:05:57,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535963019] [2022-11-03 02:05:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:05:57,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:05:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-03 02:06:03,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535963019] [2022-11-03 02:06:03,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535963019] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21989423] [2022-11-03 02:06:03,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:03,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:03,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:03,354 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:03,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:06:03,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 1901 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 02:06:03,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-03 02:06:03,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:03,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21989423] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:03,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:06:03,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-03 02:06:03,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914891327] [2022-11-03 02:06:03,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:03,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:03,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:06:03,986 INFO L87 Difference]: Start difference. First operand 17318 states and 29768 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:06:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:05,088 INFO L93 Difference]: Finished difference Result 35945 states and 62612 transitions. [2022-11-03 02:06:05,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 168 [2022-11-03 02:06:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:05,178 INFO L225 Difference]: With dead ends: 35945 [2022-11-03 02:06:05,178 INFO L226 Difference]: Without dead ends: 18644 [2022-11-03 02:06:05,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:06:05,225 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 205 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:05,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1452 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:06:05,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18644 states. [2022-11-03 02:06:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18644 to 18644. [2022-11-03 02:06:05,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18644 states, 15102 states have (on average 1.7247384452390413) internal successors, (26047), 15599 states have internal predecessors, (26047), 2652 states have call successors, (2652), 842 states have call predecessors, (2652), 889 states have return successors, (3551), 2419 states have call predecessors, (3551), 2647 states have call successors, (3551) [2022-11-03 02:06:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18644 states to 18644 states and 32250 transitions. [2022-11-03 02:06:06,001 INFO L78 Accepts]: Start accepts. Automaton has 18644 states and 32250 transitions. Word has length 168 [2022-11-03 02:06:06,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:06,001 INFO L495 AbstractCegarLoop]: Abstraction has 18644 states and 32250 transitions. [2022-11-03 02:06:06,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-11-03 02:06:06,001 INFO L276 IsEmpty]: Start isEmpty. Operand 18644 states and 32250 transitions. [2022-11-03 02:06:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-03 02:06:06,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:06,009 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:06,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:06,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 02:06:06,237 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:06,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2021768024, now seen corresponding path program 1 times [2022-11-03 02:06:06,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:06,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585210335] [2022-11-03 02:06:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:06,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:06:10,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585210335] [2022-11-03 02:06:10,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585210335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:10,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489551503] [2022-11-03 02:06:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:10,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:10,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:10,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:10,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:06:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:11,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 02:06:11,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:11,327 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:06:11,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:11,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489551503] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:11,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:06:11,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-03 02:06:11,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643311795] [2022-11-03 02:06:11,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:11,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:11,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:11,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:11,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:06:11,330 INFO L87 Difference]: Start difference. First operand 18644 states and 32250 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:06:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:12,119 INFO L93 Difference]: Finished difference Result 38660 states and 66835 transitions. [2022-11-03 02:06:12,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:06:12,120 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 168 [2022-11-03 02:06:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:12,199 INFO L225 Difference]: With dead ends: 38660 [2022-11-03 02:06:12,200 INFO L226 Difference]: Without dead ends: 20078 [2022-11-03 02:06:12,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:06:12,243 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 325 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1574 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:12,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1574 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:12,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20078 states. [2022-11-03 02:06:12,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20078 to 19890. [2022-11-03 02:06:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19890 states, 15884 states have (on average 1.7021531100478469) internal successors, (27037), 16400 states have internal predecessors, (27037), 2943 states have call successors, (2943), 1029 states have call predecessors, (2943), 1062 states have return successors, (4331), 2676 states have call predecessors, (4331), 2938 states have call successors, (4331) [2022-11-03 02:06:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19890 states to 19890 states and 34311 transitions. [2022-11-03 02:06:13,009 INFO L78 Accepts]: Start accepts. Automaton has 19890 states and 34311 transitions. Word has length 168 [2022-11-03 02:06:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:13,010 INFO L495 AbstractCegarLoop]: Abstraction has 19890 states and 34311 transitions. [2022-11-03 02:06:13,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-11-03 02:06:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19890 states and 34311 transitions. [2022-11-03 02:06:13,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:06:13,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:13,022 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:13,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:13,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-03 02:06:13,222 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 717778979, now seen corresponding path program 1 times [2022-11-03 02:06:13,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:13,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513535783] [2022-11-03 02:06:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:13,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:17,240 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:06:17,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513535783] [2022-11-03 02:06:17,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513535783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:17,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760810494] [2022-11-03 02:06:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:17,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:17,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:17,245 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:17,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:06:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:17,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-03 02:06:17,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-03 02:06:18,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:18,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760810494] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:18,224 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:06:18,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [37] total 44 [2022-11-03 02:06:18,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638594643] [2022-11-03 02:06:18,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:18,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:06:18,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:06:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1763, Unknown=0, NotChecked=0, Total=1892 [2022-11-03 02:06:18,229 INFO L87 Difference]: Start difference. First operand 19890 states and 34311 transitions. Second operand has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-03 02:06:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:23,384 INFO L93 Difference]: Finished difference Result 41907 states and 72917 transitions. [2022-11-03 02:06:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:06:23,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) Word has length 171 [2022-11-03 02:06:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:23,471 INFO L225 Difference]: With dead ends: 41907 [2022-11-03 02:06:23,471 INFO L226 Difference]: Without dead ends: 22039 [2022-11-03 02:06:23,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=244, Invalid=2408, Unknown=0, NotChecked=0, Total=2652 [2022-11-03 02:06:23,546 INFO L413 NwaCegarLoop]: 805 mSDtfsCounter, 1199 mSDsluCounter, 1550 mSDsCounter, 0 mSdLazyCounter, 5050 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 5602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 5050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:23,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 2233 Invalid, 5602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 5050 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-03 02:06:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22039 states. [2022-11-03 02:06:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22039 to 21457. [2022-11-03 02:06:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21457 states, 16982 states have (on average 1.6668236956777764) internal successors, (28306), 17541 states have internal predecessors, (28306), 3195 states have call successors, (3195), 1237 states have call predecessors, (3195), 1279 states have return successors, (4924), 2918 states have call predecessors, (4924), 3190 states have call successors, (4924) [2022-11-03 02:06:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 36425 transitions. [2022-11-03 02:06:24,669 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 36425 transitions. Word has length 171 [2022-11-03 02:06:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:24,670 INFO L495 AbstractCegarLoop]: Abstraction has 21457 states and 36425 transitions. [2022-11-03 02:06:24,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 6 states have call successors, (27), 5 states have call predecessors, (27), 5 states have return successors, (26), 7 states have call predecessors, (26), 5 states have call successors, (26) [2022-11-03 02:06:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 36425 transitions. [2022-11-03 02:06:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-03 02:06:24,677 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:24,677 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:24,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:24,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:24,888 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -810272456, now seen corresponding path program 1 times [2022-11-03 02:06:24,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:24,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929790374] [2022-11-03 02:06:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 02:06:28,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:28,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929790374] [2022-11-03 02:06:28,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929790374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:28,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892661774] [2022-11-03 02:06:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:28,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:28,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:28,218 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:28,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:06:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:06:28,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-03 02:06:28,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:06:28,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892661774] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:28,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:06:28,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [37] total 39 [2022-11-03 02:06:28,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498494631] [2022-11-03 02:06:28,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:28,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:28,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:28,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:28,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 02:06:28,679 INFO L87 Difference]: Start difference. First operand 21457 states and 36425 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-03 02:06:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:29,662 INFO L93 Difference]: Finished difference Result 22189 states and 38920 transitions. [2022-11-03 02:06:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:06:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) Word has length 171 [2022-11-03 02:06:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:29,792 INFO L225 Difference]: With dead ends: 22189 [2022-11-03 02:06:29,792 INFO L226 Difference]: Without dead ends: 22103 [2022-11-03 02:06:29,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=1471, Unknown=0, NotChecked=0, Total=1560 [2022-11-03 02:06:29,813 INFO L413 NwaCegarLoop]: 594 mSDtfsCounter, 44 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:29,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1731 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22103 states. [2022-11-03 02:06:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22103 to 21557. [2022-11-03 02:06:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21557 states, 17082 states have (on average 1.6629200327830465) internal successors, (28406), 17641 states have internal predecessors, (28406), 3195 states have call successors, (3195), 1237 states have call predecessors, (3195), 1279 states have return successors, (4924), 2918 states have call predecessors, (4924), 3190 states have call successors, (4924) [2022-11-03 02:06:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21557 states to 21557 states and 36525 transitions. [2022-11-03 02:06:30,868 INFO L78 Accepts]: Start accepts. Automaton has 21557 states and 36525 transitions. Word has length 171 [2022-11-03 02:06:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:30,869 INFO L495 AbstractCegarLoop]: Abstraction has 21557 states and 36525 transitions. [2022-11-03 02:06:30,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (26), 2 states have call predecessors, (26), 1 states have call successors, (26) [2022-11-03 02:06:30,869 INFO L276 IsEmpty]: Start isEmpty. Operand 21557 states and 36525 transitions. [2022-11-03 02:06:30,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-03 02:06:30,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:30,877 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:30,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:31,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:06:31,093 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION === [__automaton_failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:06:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:31,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1561524590, now seen corresponding path program 1 times [2022-11-03 02:06:31,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:31,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200380356] [2022-11-03 02:06:31,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:31,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-11-03 02:06:34,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:34,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200380356] [2022-11-03 02:06:34,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200380356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:34,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473514495] [2022-11-03 02:06:34,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:34,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:34,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:34,448 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:34,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44ac8dd0-5a9e-4e31-98c9-50b3489bc237/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:06:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1968 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-03 02:06:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-11-03 02:06:36,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:39,162 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-03 02:06:47,036 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-03 02:06:47,436 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-03 02:06:54,619 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-03 02:06:55,077 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-03 02:07:05,424 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions. [2022-11-03 02:07:05,579 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 49188 disjunctions. This might take some time... [2022-11-03 02:10:50,417 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 49188 disjunctions. [2022-11-03 02:10:51,059 WARN L176 XnfTransformerHelper]: Simplifying conjuction of 9813 disjunctions. This might take some time... [2022-11-03 02:11:01,849 INFO L192 XnfTransformerHelper]: Simplified to conjuction of 9813 disjunctions.